91. Which one of the following ions has the maximum number of unpaired electrons? (A) Cu²⁺ (B) Na⁺ (C) Cr³⁺ (D) Fe³⁺ Which Ion Has the Maximum Number of Unpaired […]
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IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Number of Distinct Products Formed on Nitration of Tetralone
88. The number of distinct products formed after the nitration of tetralone in the presence of HNO₃ and H₂SO₄ is ________. (in integer) Number of Distinct Products Formed After Nitration […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
pH of a Weak Acid with 0.1% Ionization
87. If a weak acid HA is 0.1% ionized (dissociated) in a 0.2 M solution, its pH will be ________. (round off to one decimal place) pH of a Weak […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Volume of 4 M NaOH Required to Prepare 350 mL
86. The volume of 4 M NaOH (in ml) required to make 350 ml solution of 1.2 M NaOH is ________. (in integer) Volume of 4 M NaOH Required to […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
True Statements About Phenoxide Ions
85. Which of the following statements is/are true about phenoxide ions? (A) Phenoxides undergo O-alkylation in ethers (B) Phenoxides undergo extensive C-alkylation in trifluoroethanol (C) Ethers make strong hydrogen bonds […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Relation Between Forward and Reverse Equilibrium Constants
84. The correct relation between the equilibrium constants of the forward reaction (Kf) and the reverse reaction (Kr) at the same temperature is: (A) Kf = Kr (B) Kf = […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Gas Phase Acidity Order
83. The correct gas phase acidity order for alcohols FCH₂OH, CH₃OH, ClCH₂OH and BrCH₂OH is (A) ClCH₂OH > BrCH₂OH > CH₃OH > FCH₂OH (B) FCH₂OH > BrCH₂OH > ClCH₂OH > […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Order of Repulsive Interactions Between Electron Pairs
82. The repulsive interaction between different types of electron pairs increases in the order of (A) bond pair – bond pair < lone pair – bond pair < lone pair […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Correct Decreasing Order of Electron Gain Enthalpy
81. Which one of the following is the correct decreasing order for the magnitude of Electron Gain Enthalpy () for the elements given below? (A) Br > Cl > At […]
IIT JAM Biotechnology Previous Year Question paper Topic chemistry
Number of Equatorial Hydrogens in trans-Decalin
80. The number of equatorial hydrogens in the following structure is Number of Equatorial Hydrogens in trans-Decalin Correct Answer ✅ Correct Answer: 8 Identifying the Structure The given compound is […]
